DP&L Inc. is a subsidiary of AES Corporation. Through its subsidiaries The Dayton Power and Light Company and DPL Energy Resources, DP&L sells to, and generates electricity for, a customer base of over 500,000 people within a 6,000-square-mile (16,000 km2) area of West Central Ohio, including the area around Dayton, Ohio, its namesake. Electricity for DP&L's 24 county service area within Ohio's Miami Valley is primarily generated at eight coal-fired power plants, but DP&L also provides service to its clients via the use of combustion turbines, diesel peaking units, and solar powered properties.